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Connect Luhn Credit Card Validator to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Check card validity and identify issuers with one command.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 3 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through Luhn Validator.

  1. 01

    Get issuer rules

    This capability provides the specific length and prefix requirements for recognized card issuers. Use it to check what a valid card from a specific network should look like.

  2. 02

    Identify issuer only

    This capability identifies the specific card network a number belongs to. It works by analyzing patterns without performing a full Luhn mathematical validation.

  3. 03

    Validate card number

    This capability performs a complete check to see if a credit card number is mathematically valid. It also returns the name of the issuer for that number.

Real work

What teams actually run

01

Data Entry Verification

Your agent checks if a user-provided card number is mathematically valid before it hits a database.

02

Payment System Testing

Developers use the capability to verify that their code correctly handles different card issuer formats.

03

Fraud Detection Support

The MCP flags numbers that fail the Luhn checksum during automated data audits.

04

Financial Data Cleaning

You use it to scrub datasets by removing invalid card numbers based on issuer rules.

One connector, every AI

Luhn Validator works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put Luhn Validator to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

817ms average. Fast in production.

Luhn Validator is checked daily against the live service.

Daily averagePeak 962ms
Oct 3Today
Fastest day
604ms
Slowest day
962ms
14-day trend
Improving-14%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Luhn Validator, so you can see the experience inside your AI.

It does not authenticate your account with Luhn Validator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Luhn Validator Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_TYgI9tffnnY0h8olCBqkarlvfOpC55KR65d41UtG/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Luhn Validator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "luhn-credit-card-validator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_TYgI9tffnnY0h8olCBqkarlvfOpC55KR65d41UtG/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Luhn Validator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Luhn Validator owners hand off.

This MCP is built for professionals handling financial data or building automated verification workflows.

  • 01

    Software Developers

    They hand off card validation logic to their agent during testing or app development.

  • 02

    Fintech Analysts

    They use the capability to verify the accuracy of transaction data sets.

  • 03

    QA Engineers

    They use it to automate the testing of payment processing inputs.

FAQ

Questions Luhn Validator owners ask.

  • 01

    How does this MCP validate credit card numbers?

    It uses the Luhn mod-10 algorithm to perform a mathematical checksum on the provided number.

  • 02

    Can I identify a card issuer without a full validation?

    Yes, you can use the identify_issuer_only capability to find the network by analyzing digit patterns and length.

  • 03

    Which AI clients can use this MCP?

    You can connect this MCP to any compatible client like Claude, Cursor, Windsurf, or VS Code.

  • 04

    Does it support American Express and Visa?

    Yes, the MCP can identify various issuers including Visa, Mastercard, and American Express.

  • 05

    What are issuer rules?

    Issuer rules are the specific prefix and length requirements that define a particular card network.

  • 06

    How does the validation work?

    The server uses the Luhn mod-10 algorithm to perform a checksum on the digits, ensuring the number is mathematically consistent with standard credit card formats.

  • 07

    Which card issuers are supported?

    The capability currently identifies Visa, Mastercard, and American Express.

  • 08

    Can I use this to check if a card is active?

    No, this capability only validates the mathematical structure of the number. It cannot check if a card is active, has funds, or is stolen.

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